器件名称:
STK22C48N35
功能描述:
2K x 8 AutoStore
文件大小:
297.29KB 共11页
简 介:
STK22C48 2K x 8 AutoStore nvSRAM QuantumTrap CMOS Nonvolatile Static RAM FEATURES 25ns, 35ns and 45ns Access Times “Hands-off” Automatic STORE with External 68F Capacitor on Power Down STORE to Nonvolatile Elements Initiated by Hardware or AutoStore on Power Down Automatic RECALL on Power Up 10mA Typical ICC at 200ns Cycle Time Unlimited READ, WRITE and RECALL Cycles 1,000,000 STORE Cycles to Nonvolatile Elements 100-Year Data Retention in Nonvolatile Elements Single 5V + 10% Operation Commercial and Industrial Temperatures 28-Pin DIP and SOIC Packages DESCRIPTION The Simtek STK22C48 is a fast static RAM with a nonvolatile element incorporated in each static memory cell. The SRAM can be read and written an unlimited number of times, while independent, nonvolatile data resides in Nonvolatile Elements. Data transfers from the SRAM to the Nonvolatile Elements (the STORE operation) can take place automatically on power down. A 68F or larger capacitor tied from VCAP to ground guarantees the STORE operation, regardless of power-down slew rate or loss of power from “hot swapping”. Transfers from the Nonvolatile Elements to the SRAM (the RECALL operation) take place automatically on restoration of power. A hardware STORE may be initiated with the HSB pin. BLOCK DIAGRAM VCCX VCAP POWER CONTROL PIN CONFIGURATIONS VCAP NC A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 VSS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 Quantum Trap 32 x 512 ROW DECODER A5……
